Cangzhou Bohai Pipe Co., Ltd. specializing in the production of alloy steel elbow p22 process because of different manufacturing processes P91 alloy steel elbow, is divided into hot-rolled (extrusion) seamless two kinds of seamless steel tubes and cold drawn (rolled). Cold drawn (rolled) pipe is divided into two kinds of circular pipe and shaped pipe. a. Process Overview of hot-rolled (extruded seamless pipe): round tube → heating → perforation → three-roll rolling, rolling or extrusion → → set off pipe diameter (or reducing) → cooling → → billet tube straightening → hydrostatic test (or testing) → mark → storage. Cangzhou Bohai Steel Pipe Co., Ltd. specializes in producing p22 alloy pipe elbow standard GB3087-2008 (low and medium pressure boiler seamless steel tubes). Mainly used in industrial boilers and domestic boilers low pressure fluid transportation pipeline. Representative material for 10,20 steel. GB5310-2008 (high-pressure boiler seamless steel tubes). Mainly used for power plants and nuclear power plant boiler high temperature, high pressure fluid collection tank and pipeline transport. Representative material for 20G, 12Cr1MoVG, 15CrMoG like. GB5312-1999 (ship seamless carbon steel and carbon-manganese). Mainly used in ship boilers and Superheater I, II grade pressure pipe. Representative material for 360,410,460 steel grade and so on. 16Mn 12CrMo alloy steel elbow elbow _ Quality First (Online) _ Taian Steel Limited provided by Cangzhou Bohai elbow fittings. Cangzhou Bohai Tube Co., Ltd. (www.czbh628.com) (www.hbbh628.com) is an industry leader in Cangzhou, Hebei, three, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Cangzhou Bohai leadership with the staff warmly welcome all inquiries negotiations to create a better future Cangzhou Bohai.